A standard quantity used to express and compare measurements. In chemistry, common units include meters for length, grams for mass, and seconds for time.
Metric System: An international decimal-based system of measurement.
SI Units: The International System of Units; it's an updated version of the metric system and is now widely used worldwide for scientific measurements.
Conversion Factor: A ratio derived from the equality between two different units that can be used to convert from one unit to another.
AP Chemistry - 1.1 Moles and Molar Mass
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